Getting started w Python Q

I was able to get my GoPiGo moving with Python with the directions here:
[http://mygopigo.com/python_lessons/1_Getting_Started/1], and I see the resource here https://gopigo3.readthedocs.io/en/latest/tutorials-basic/index.html. The trouble is that I literally don’t know where to type code. Is there a window like the one in the attached screenshot? If you answer this question, (1) thank you, and (2) please clarify any technical terms you use. For example, one direction says, " open a terminal or the command line and type the following command:" I have no idea what a terminal or command line is. Thanks.
16%20PM

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